WesBell is now offering 3:1 and 4:1 heat shrink tubing products online with pricing. You can purchase 100’, 500’ or 1000’ quantities on a spool or in 4’ lengths. We also have the ability to cut tubing to length through our value added services department. We’ve been using tubing products for over 15 years by manufacturing wire harnesses and cable assemblies, but we mostly used 2:1 flexible or adhesive versions.
3 to 1 Heat shrink tubing
The term 3:1, or 3 to 1, means that you divide by 3 to figure out what the tubing can shrink to. For instance, 1” tubing shrinks 67% to 1/3” and 3/4” tubing shrinks to 1/4”. So, if the application requires the tubing to shrink to 1/4″, why not just buy 1/2″, 2:1 instead? Well, first view the picture to the left, notice how the tubing is shrunk over two diameters because of the cable jacket. The tubing will have to be big enough to fit over the cable jacket and it will have to shrink enough to get down to the conductors. Therefore, 3/4″ 3:1 shrinkable tubing will fit over the 1/2″ cable jacket and it will shrink down to 1/4″ to fit tightly to the conductors.
4 to 1 Heat shrink tubing
The term 4:1, or 4 to 1, means that you divide by 4 to figure out what the tubing can shrink to. For instance, 1” tubing shrinks 75% to 1/4” and 3/4” tubing shrinks to .1875”. 4 to 1 tubing products come in a standard flexible version and an adhesive lined version. The adhesive line is glue that resides on the inside of the tubing wall and it melts when heat is applied. Once it dries there is a water tight seal that’s nearly impossible to remove. Adhesive lined tubing can be used as a splice kit to wire and cable because it holds the same attributes as far as temperature and voltage along with a water tight seal.
Please call if you have any questions about our tubing products (800) 334-8400.